By some strange and bizarre circumstances a man came to my garden and sprayed my Pieris and my Amelanchier with a solution of diazinon and funginex. I was horrrified as I don't spray or use pesticides in my garden. This was on April 20. On April 21 when I went out to look at my garden, many of the plants near these sprayed trees seem to be wilted. I am hoping that is just a reaction to the late, hot afternoon sun and not a result of the spray. Are my plants in danger of dying?